diff --git a/BitFaster.Caching/Throw.cs b/BitFaster.Caching/Throw.cs
index ef11a16e..d56ca5ec 100644
--- a/BitFaster.Caching/Throw.cs
+++ b/BitFaster.Caching/Throw.cs
@@ -7,17 +7,35 @@ namespace BitFaster.Caching
 {
     internal static class Throw
     {
-        public static void ArgNull(ExceptionArgument arg) => throw CreateArgumentNullException(arg);
-
-        public static void ArgOutOfRange(string paramName) => throw CreateArgumentOutOfRangeException(paramName);
-
+#if NETCOREAPP3_0_OR_GREATER
+        [DoesNotReturn]
+#endif
+        public static void ArgNull(ExceptionArgument arg) => throw CreateArgumentNullException(arg);
+
+#if NETCOREAPP3_0_OR_GREATER
+        [DoesNotReturn]
+#endif
+        public static void ArgOutOfRange(string paramName) => throw CreateArgumentOutOfRangeException(paramName);
+
+#if NETCOREAPP3_0_OR_GREATER
+        [DoesNotReturn]
+#endif
         public static void ArgOutOfRange(string paramName, string message) => throw CreateArgumentOutOfRangeException(paramName, message);
 
         [ExcludeFromCodeCoverage]
-        public static void InvalidOp(string message) => throw CreateInvalidOperationException(message);
-
+#if NETCOREAPP3_0_OR_GREATER
+        [DoesNotReturn]
+#endif
+        public static void InvalidOp(string message) => throw CreateInvalidOperationException(message);
+
+#if NETCOREAPP3_0_OR_GREATER
+        [DoesNotReturn]
+#endif
         public static void ScopedRetryFailure() => throw CreateScopedRetryFailure();
 
+#if NETCOREAPP3_0_OR_GREATER
+        [DoesNotReturn]
+#endif
         public static void Disposed<T>() => throw CreateObjectDisposedException<T>();
 
         [MethodImpl(MethodImplOptions.NoInlining)]